Football legend Jimmy Greaves is in hospital in intensive care after suffering a severe stroke.
The former Tottenham Hotspur, Chelsea and AC Milan striker was taken ill on 3 May.
The 75-year-old, who had a minor stroke in 2012, scored 44 goals in 57 England games - the fourth highest of all time.
A statement issued on behalf of Greaves's family read: "His wife, Irene, and four children have asked for privacy during what is a worrying time for the family.
"They will issue a bulletin on his condition when it is appropriate.
"England's greatest ever goal scorer was 75 on February 20, and has been working regularly on the personal appearances circuit in harness with his friend and agent Terry Baker.
"Jimmy had a minor stroke in 2012, but appeared to have made a full recovery. He was due to be inducted into the Tottenham Hotspur Hall of Fame on May 13 at a sell-out ceremony at White Hart Lane.
"This is all we wish to say at the present time."